Arian Lewis Peterson (born March 21, 1985 in Palestine, Texas.), nicknamed A.D. ("All Day") and "Purple Jesus" is a professional American football running back for the Minnesota Vikings of the National Football League (NFL). He played college football as a running back for three years at the University of Oklahoma. At Oklahoma, Peterson set the NCAA freshman rushing record with 1,925 yards (as a true freshman and not a redshirt freshman) as a first team All-American, when he also set the freshman record of runner-up in the Heisman Trophy balloting, and finished as the school's third all-time leading rusher.'